| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
| 139 | DF | CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES {7} |
| 160 | DF | .~ For relays or solenoids {11} |
| 161 | DF | .~.~ Including thermal device {3} |
| 163 | | .~.~.~ Bimetallic element {1} |
| 164 | DF | .~.~.~.~> Including heater |